<template>
    <div class="login_container">
           <div class="login_box">
            <!-- 头像区域 -->
            <div class="avatar_box">
                <img src="../assets/logo.png" alt="">
            </div>
            <!-- 登录表单区域 -->
            <el-form label-width="0px" ref="loginFormRef" class="login_form" :model="loginFrom" :rules="loginFormRules">
                <!-- 用户名 -->
                <el-form-item prop="username">
                    <el-input prefix-icon="el-icon-user" v-model="loginFrom.username"></el-input>
                </el-form-item>
                <!-- 密码 -->
                <el-form-item  prop="password">
                    <el-input type="password" prefix-icon="el-icon-lock" v-model="loginFrom.password"></el-input>
                </el-form-item>
                <!-- 按钮区域 -->
                <el-form-item class="btns">
                    <el-button type="primary" @click="login">登录</el-button>
                    <el-button type="info" @click="resetLoginForm">重置</el-button>
                </el-form-item>
            </el-form>
        </div>
    </div>
</template>

<script>
export default {
  data () {
    return {
      //   登录表单的数据绑定对象
      loginFrom: {
        username: '',
        password: ''
      },
      //   表单验证规则对象
      loginFormRules: {
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    resetLoginForm () {
      this.$refs.loginFormRef.resetFields()
    },
    login () {
      this.$refs.loginFormRef.validate(async valid => {
        if( !valid) return;
        const {data :result} = await this.$http.post('login', this.loginFrom);
        if(result.meta.status !== 200){
          return this.$message.error(result.meta.msg)
        }else{
          this.$message.success('登录成功');
          window.sessionStorage.setItem("token", result.data.token)
          this.$router.push('/home')
        }
      })
    }
  }
}
</script>

<style lang="less" scoped>
.login_container {
    height: 100%;
    background-color: #b6c0ca;
}

.login_box {
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);

    .avatar_box {
        height: 130px;
        width: 130px;
        border-radius: 50%;
        padding: 10px;
        box-shadow: 0 0 10px #ddd;
        position: absolute;
        left: 50%;
        transform: translate(-50%, -50%);
        background-color: #fff;
        img {
            width: 100%;
            height: 100%;
            border-radius: 50%;
            background-color: #eee;
        }
    }
}

.login_form {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
}

.btns {
    display: flex;
    justify-content: flex-end;
}
</style>
